wifi: Use new API for data usage function

For mobile, a old API: buildTemplateMobileAll doesn't includes the
merged wifi network, call the new API: buildTemplateCarrierMetered
to replace the old one.

PS: Not only usage functionality but also apply to network policy
control since the default policy is changing to use
new API: buildTemplateCarrier now.

Test: atest -c DataUsageControllerTest
Test: atest -c NetworkCycleDataForUidLoaderTest
Test: atest -c NetworkPolicyEditorTest
Test: Manual Test, modify the mobile usage warming and limit bytes and
      check the data via adb shell dumpsys netpolicy
Bug: 176396812
Change-Id: I1c7da4a819e45009efe5ba2b80e1526ce6b04e27